Nightmare dealing with Cell C

I have take an upgrade on 2nd of June and was promised a screen guard and a power bank that comes with the device. I've contacted Cell C on numerous occasions (13 times) and also requested for the the sales consultant (Onke Bolooi) Team Manager to call me back, never received feedback. Eventually a case was open up on the 16 July and was told within 24 or 48 hours, I should get a response.Still to date, Cell C has failed to contact me.I am sick and tired wasting my time.CELL C sort the issue or else I'll be forced to cancell my contacts with you.